diff --git a/printers.sls b/printers.sls
index 3f8f968..f2597a9 100644
--- a/printers.sls
+++ b/printers.sls
@@ -26,6 +26,11 @@
     - shell: powershell
     - unless: Get-Printer -Name '{{ printer | replace('_', ' ') }}'
 {% endfor %}
+
+
+# enable duplexer for Classroom HP
+"Set-PrinterProperty -PrinterName 'ClassroomColor HP' -PropertyName Config:DuplexUnit -Value Installed":
   cmd.run:
     - shell: powershell
-    - unless: Get-Printer -Name ClassroomColor
+    - unless:
+        - if ($(Get-PrinterProperty -PrinterName "ClassroomColor HP" -PropertyName Config:DuplexUnit).value -eq "Installed") { exit 0 } else { exit 1 }